So it sounds like there's a general consensus that a female who is eating normally (doesn't stop eating), has no problem growing from 800g to 1500g in 12 months. I think aalomon said in another thread that that can of weight can be put on in 6 months even.
I'm still curious about my original question: "if you are trying to grow a female to breed in 2 years, what is your "on track" weight at the end of year 1 to hit 1500 at end of year 2, given typical growth rates?" I'm guessing based on what I've heard maybe the halfway mark, for a female that doesn't stop eating, would be around 600-700g. (Putting on more total weight in the second year).